Calling them "pinto genetics" can be confusing-- yes, the frame and splash genes that cause blue eyes are also known for causing white body markings at their higher expressions that make a horse eligible (depending on bloodlines of course) for full registry with the Paint and/or Pinto registries. But splash and frame can and do exist in primarily 'solid' breeds as well-- mostly at minimal expressions of face and leg white, sometimes a blue eye or 2 --- nothing that would be enough to call that horse as a pinto/paint.
Occasionally when these apparent 'solids' are bred, a fully pinto marked offspring will result (especially possible if both parents show clues of having minimally expressed splash and/or frame). This doesn't mean that the horse has Pinto or Paint ancestry--as in, ancestry that has full body spotting, or that is registered with either Pinto or Paint registries--It just means that the genes to make those potential markings existed in their ancestry and happened to combine with each other/just the right modifiers/etc. to have white patterning that is more highly expressed in that particular individual than it was in the parents and possibly any other known ancestor prior.
Last edited by Eastowest; 02-25-2010 at 05:43 PM.